Home during Summer Months
In all societies
there are the gullible, the uninformed and the well informed.
The gullible, listen to whom ever has a little knowledge but
far from what needs to be known.
uninformed, are those who insist that whatever they think, or
have, is the best.
well informed, seek out the knowledge and implement it, despite
their seemingly isolated social choice.
is presumed that just ventilating the roof is going to be sufficient
whereas the reality it is only half the story, which provides
less than half the potential of keeping a home cooler naturally
in the summer months.
the roof will reduce the overall heat retention of the building
however the exercise is to be proactive and make living conditions
comfortable in the rooms below without incurring the high and
higher cost of using an air conditioner
those with 2.7m ceilings are going to have a cooler rooms longer
than those with 2.4m ceilings and 3m ceilings cooler again
raked or cathedral ceilings will have a situation proportional
to the height of the roof and the resistance (insulation) contained
with the homeowner needs to feel confident that the concept
of ventilation is a worthwhile and is a cost efficient exercise.
this simply consider the following,
Fill a bucket
with water and obviously if you put a hole in the bucket the
water is going to escape. The bucket will empty proportional
to the hole, the bigger the hole the faster the escape.
the physical principle governing the escape of water in a contained
area and the physical principles governing heat in a room is
the inverse, or opposite to, water in a bucket.
the bucket upside down like a hot air balloon and pour heat
into it, the warmest air is going to be at the top of the air
balloon, which is the energy that causes a hot air balloon to
If you put
a hole in the top of the air balloon the heat is going to escape
and down comes the balloon.
a roof, is precisely that, allowing the heat to escape so it
doesn't build up in the form of back pressure and transfer into
the rooms below via conduction
On the roof,
the hole is what is essential....the size of the hole dictates
the efficiency, and one large hole is more efficient than many
on top of the hole is called a roof ventilator......and all
roof ventilators are not equal
the optimum performance out of roof ventilation....read roof
Does Roof Ventilation Work?